Lathe attachment.



E. C. ROGERS.

LATHE ATTACHMENT.

APPLICATION FILED MAR. 4. l9l6.

1 ,1 87,099. Patent-ed June 13, 1916.

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E. C. ROGERS LATHE ATTACHMENT.

APPLICATION FILED MAR. 4. 1916.

1,187,099. Patented June 13, 1916.

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THE COLUMBIA PLANOORAPN co WASHINgiTQIi, n. c.

EDWARD C. ROGERS, OF LATROBE, PENNSYLVANIA.,

LATHE ATTACHMENT.

Specification of Letters Patent.

Patented J une 13, 1916.

Application filed March 4, 1916. Serial No. 82,120.

To all whom it may concern:

Be it known that I, EDWARD O. ROGERS, a citizen of the United States,residing at Latrobe, in the county of Westmoreland and State ofPennsylvania, have invented certain new and useful Improvements in LatheAttachments, of which the following is a specification.

My invention relates broadly to lathes and has particular reference toimprovements in means for holding the cutting tool or tools thereof, sothat it will not be subjected to undue strains, when the machine isbeing used for heavy work.

A further object of the invention is to provide means of the abovementioned character, which is simple in construction, inexpensive tomanufacture, strong and durable.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the accompanying drawings forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame, Figure 1 is a side elevation of a lathe, having my inventionapplied thereto, Fig. 2 is a side elevation of one tool prop andassociated elements, Fig. 3 is a detail section taken on line 33 of Fig.2, Fig. 4 is an end elevation of the lathe, showing my invention appliedthereto, and, Fig. 5 is a side elevation of the upper tool and prop.

In the drawings, wherein for the purpose of illustration is shown apreferred embodiment of my invention, the numeral 10 designates ahorizontally arranged base of the lathe, upon which is mounted to movelongitudinally thereof, a carriage 11. Mounted to move longitudinally ofthe carriage and transversely of the base are slides 12 and 13 whichhave depending lugs 14 and 15 respectively. These depending lugs havescrew-threaded openings provided with right and left screw-threads forreceiving portions 16 and 17 of an operating screw 18, having right andleft screwthreads, as shown. The operating screw 18 is turned by a crank19 and it is obvious that its rotation will simultaneously move theslides 12 and 13 toward and away from each other.

The numeral 20 designates the work and elements 21 and 22 the means forholding the work and rotating it upon its longitudinal axis, as iscustomary.

The sllde 12 has a tool holder 23 bolted or otherwlse rigidly secured toits top, withm wh ch is arranged a lower horizontal tool or cutter 24,which may be clamped thereln by means of a bolt 25.

The numeral 26 designates an adjusting bolt, havlng screw-threadedengagement within an opening formed in a bracket 27 carried by the slide12. The bolt 26 is adapted to contact with the outer end of the tool 24,thus preventing its longitudinal movement. Arranged'beneath the tool 24ad acent its forward cutting end and at a right angle thereto is a lowervertical prop 2:7, havlng a base 28, bolted or otherwise rigldlyattached to the bottom of the slide 12 as shown at 29. As clearly shownin F g. 3, the upper end of the prop 27 is provided wlth a preferablyV-shaped groove 30, receivlng a V-shaped portion 31 formed upon thelower side of the tool 24 at lts cutting end. It is thus apparent thatthe prop 27 engages the tool 24 at or near 1t s cutting end, and beingarranged at a right angle thereto, holds the same against lateralmovement in a highly satisfactory manner. As there is no connectionbetween the prop 27 and tool 24 other than a contact, it is obvious thatthe prop does not interfere with the longitudinal adjustment of the toolwith respect to its slide, upon which it is mounted.

Bolted or otherwise rigidly mounted upon the coacting slide 13 is anover-hanging arm 30, to the outer end of which is rigidly secured anupper vertical prop 31. The lower end of the prop 31 is arranged aboveand contacts with the cutting end of an upper tool 32, which has itsouter end held with in a tool holder 33, bolted or otherwise rigidlysecured to the slide 13, as shown at 34. The lower end of the prop 31 isprovided with a V-shaped groove identical with the groove 30 and theupper portion of the tool 32, at its cutting end, has a V-shaped portionidentical with the V-shaped portion 31, to enter the groove. It is thusapparent that the prop 31 is arranged at a right angle, tothe tool 32above and at its cutting end, whereby the same securely holds the toolagainst improper lateral movements.

In the operation, the work is mounted upon the lathe in the usual mannerand is caused to rotate upon its longitudinal axis. By propermanipulation of the operating screw 18, the tools 24 and 32 are broughtinto contact with the work and operate within the same cut. The propshold the tools against bending or lateral movement, thus taking unduestrains from the same.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes in the shape, size, and arrangement of parts may beresorted to without departing from the spirit of the invention or thescope of the subjoined claim.

Having thus claim 2- The combination with a slide of a lathe having anattaching portion and a laterally projecting arm extending inwardlybeyond the attaching portion for a substantial distance, of atool havingone end arranged upon the attaching portion of the slide and providedadjacent its opposite cutting end and upon the side thereof remote fromthe described my invention, I

Gopies of this patent may be, obtained for work with respect to thedirection of rotation of the work with a longitudinal tongue, adjustablemeans for clamping the tool to the attaching portion so that the toolmay be shifted longitudinally with respect to the slide, a prop arrangedat substantially a right angle to the tool upon the side thereof remotefrom the work With respect to its direction of rotation and secured tothe free end of the arm and provided with a transverse groove extendinglongitudinally of the tool to receive the longitudinal tongue thereoffor forming with the tool atongue and groove connection, whereby thetool is braced against movement in the direction of rotation of the workand longitudinally of the work in opposite directions but is free to belongitudinally adjusted toward and away from the work.

In testimony whereof I affix my signature two witnesses.

in presence of EDWARD C. ROGERS. Witnesses:

W. T. OSBORNE,

CHAS. W. ROGERS.

five cents each, by addressing the Commissioner of Patents. Washington,D. G.

